Merge pull request #72861 from BenTheElder/slightly-less-bash-fire

cluster/get-kube-binaries.sh

@@ -39,7 +39,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(cd $(dirname "${BASH_SOURCE}")/.. && pwd)
+KUBE_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
 
 KUBERNETES_RELEASE_URL="${KUBERNETES_RELEASE_URL:-https://dl.k8s.io}"
 
@@ -50,7 +50,7 @@ function detect_kube_release() {
 
   if [[ ! -e "${KUBE_ROOT}/version" ]]; then
     echo "Can't determine Kubernetes release." >&2
-    echo "${BASH_SOURCE} should only be run from a prebuilt Kubernetes release." >&2
+    echo "${BASH_SOURCE[0]} should only be run from a prebuilt Kubernetes release." >&2
     echo "Did you mean to use get-kube.sh instead?" >&2
     exit 1
   fi
@@ -59,7 +59,8 @@ function detect_kube_release() {
 }
 
 function detect_client_info() {
-  local kernel=$(uname -s)
+  local kernel machine
+  kernel="$(uname -s)"
   case "${kernel}" in
     Darwin)
       CLIENT_PLATFORM="darwin"
@@ -76,7 +77,7 @@ function detect_client_info() {
 
   # TODO: migrate the kube::util::host_platform function out of hack/lib and
   # use it here.
-  local machine=$(uname -m)
+  machine="$(uname -m)"
   case "${machine}" in
     x86_64*|i?86_64*|amd64*)
       CLIENT_ARCH="amd64"
@@ -92,7 +93,7 @@ function detect_client_info() {
       ;;
     s390x*)
       CLIENT_ARCH="s390x"
-      ;;	  
+      ;;
     *)
       echo "Unknown, unsupported architecture (${machine})." >&2
       echo "Supported architectures x86_64, i686, arm, arm64, s390x." >&2
@@ -132,9 +133,10 @@ function download_tarball() {
     exit 4
   fi
   echo
-  local md5sum=$(md5sum_file "${download_path}/${file}")
+  local md5sum sha1sum
+  md5sum=$(md5sum_file "${download_path}/${file}")
   echo "md5sum(${file})=${md5sum}"
-  local sha1sum=$(sha1sum_file "${download_path}/${file}")
+  sha1sum=$(sha1sum_file "${download_path}/${file}")
   echo "sha1sum(${file})=${sha1sum}"
   echo
   # TODO: add actual verification
@@ -151,8 +153,8 @@ function extract_arch_tarball() {
   # Tarball looks like kubernetes/{client,server}/bin/BINARY"
   tar -xzf "${tarfile}" --strip-components 3 -C "${platforms_dir}"
   # Create convenience symlink
-  ln -sf "${platforms_dir}" "$(dirname ${tarfile})/bin"
-  echo "Add '$(dirname ${tarfile})/bin' to your PATH to use newly-installed binaries."
+  ln -sf "${platforms_dir}" "$(dirname "${tarfile}")/bin"
+  echo "Add '$(dirname "${tarfile}")/bin' to your PATH to use newly-installed binaries."
 }
 
 detect_kube_release
@@ -213,7 +215,7 @@ fi
 
 if [[ -z "${KUBERNETES_SKIP_CONFIRM-}" ]]; then
   echo "Is this ok? [Y]/n"
-  read confirm
+  read -r confirm
   if [[ "${confirm}" =~ ^[nN]$ ]]; then
     echo "Aborting."
     exit 1

cluster/get-kube-local.sh

@@ -23,9 +23,9 @@ set -o pipefail
 KUBE_HOST=${KUBE_HOST:-localhost}
 KUBELET_KUBECONFIG=${KUBELET_KUBECONFIG:-"/var/run/kubernetes/kubelet.kubeconfig"}
 
-declare -r RED="\033[0;31m"
-declare -r GREEN="\033[0;32m"
-declare -r YELLOW="\033[0;33m"
+declare -r RED="\\033[0;31m"
+declare -r GREEN="\\033[0;32m"
+declare -r YELLOW="\\033[0;33m"
 
 function echo_green {
   echo -e "${GREEN}$1"; tput sgr0
@@ -49,7 +49,7 @@ function run {
     echo_green "SUCCESS"
   else
     echo_red "FAILED"
-    echo $output >&2
+    echo "${output}" >&2
     exit 1
   fi
 }
@@ -58,13 +58,14 @@ function run {
 # Args: the IP address of the API server (e.g. "http://localhost:8080"), destination file path
 function create-kubelet-kubeconfig() {
   #local api_addr="${1}"
-  local destination="${2}"
+  local destination dest_dir
+  destination="${2}"
   if [[ -z "${destination}" ]]; then
     echo "Must provide destination path to create Kubelet kubeconfig file!"
     exit 1
   fi
   echo "Creating Kubelet kubeconfig file"
-  local dest_dir="$(dirname "${destination}")"
+  dest_dir="$(dirname "${destination}")"
   mkdir -p "${dest_dir}" &>/dev/null || sudo mkdir -p "${dest_dir}"
   sudo=$(test -w "${dest_dir}" || echo "sudo -E")
   cat <<EOF | ${sudo} tee "${destination}" > /dev/null
@@ -85,7 +86,7 @@ EOF
 
 function create_cluster {
   echo "Creating a local cluster:"
-  echo -e -n "\tStarting kubelet..."
+  echo -e -n "\\tStarting kubelet..."
   create-kubelet-kubeconfig "http://localhost:8080" "${KUBELET_KUBECONFIG}"
   run "docker run \
   --volume=/:/rootfs:ro \
@@ -102,8 +103,8 @@ function create_cluster {
   k8s.gcr.io/hyperkube-${arch}:${release} \
     /hyperkube kubelet \
       --containerized \
-      --hostname-override="127.0.0.1" \
-      --address="0.0.0.0" \
+      --hostname-override=127.0.0.1 \
+      --address=0.0.0.0 \
       --kubeconfig=${KUBELET_KUBECONFIG} \
       --pod-manifest-path=/etc/kubernetes/manifests \
       --allow-privileged=true \
@@ -113,7 +114,8 @@ function create_cluster {
 
   echo -e -n "\tWaiting for master components to start..."
   while true; do
-    local running_count=$(kubectl -s=http://${KUBE_HOST}:8080 get pods --no-headers --namespace=kube-system 2>/dev/null | grep "Running" | wc -l)
+    local running_count
+    running_count=$(kubectl "-s=http://${KUBE_HOST}:8080" get pods --no-headers --namespace=kube-system 2>/dev/null | grep -c "Running")
     # We expect to have 3 running pods - etcd, master and kube-proxy.
     if [ "$running_count" -ge 3 ]; then
       break
@@ -124,7 +126,7 @@ function create_cluster {
   echo_green "SUCCESS"
   echo_green "Cluster created!"
   echo ""
-  kubectl -s http://${KUBE_HOST}:8080 clusterinfo
+  kubectl -s "http://${KUBE_HOST}:8080" clusterinfo
 }
 
 function get_latest_version_number {
@@ -172,7 +174,7 @@ fi
 
 kubectl_url="https://storage.googleapis.com/kubernetes-release/release/${release}/bin/${platform}/${arch}/kubectl"
 
-if [[ $(ls . | grep ^kubectl$ | wc -l) -lt 1 ]]; then
+if [[ ! -f ./kubectl ]]; then
   echo -n "Downloading kubectl binary..."
   if [[ $(which wget) ]]; then
     run "wget ${kubectl_url}"
@@ -195,7 +197,7 @@ create_cluster
 echo ""
 echo ""
 echo "To list the nodes in your cluster run"
-echo_yellow "\tkubectl -s=http://${KUBE_HOST}:8080 get nodes"
+echo_yellow "\\tkubectl -s=http://${KUBE_HOST}:8080 get nodes"
 echo ""
 echo "To run your first pod run"
-echo_yellow "\tkubectl -s http://${KUBE_HOST}:8080 run nginx --image=nginx --port=80"
+echo_yellow "\\tkubectl -s http://${KUBE_HOST}:8080 run nginx --image=nginx --port=80"

cluster/get-kube.sh

@@ -85,10 +85,11 @@ KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-([a
 #   KUBE_VERSION
 function set_binary_version() {
   if [[ "${1}" =~ "/" ]]; then
-    export KUBE_VERSION=$(curl -fsSL --retry 5 "https://dl.k8s.io/${1}.txt")
+    KUBE_VERSION=$(curl -fsSL --retry 5 "https://dl.k8s.io/${1}.txt")
   else
-    export KUBE_VERSION=${1}
+    KUBE_VERSION=${1}
   fi
+  export KUBE_VERSION
 }
 
 # Use the script from inside the Kubernetes tarball to fetch the client and
@@ -129,7 +130,7 @@ fi
 if [[ -d "./kubernetes" ]]; then
   if [[ -z "${KUBERNETES_SKIP_CONFIRM-}" ]]; then
     echo "'kubernetes' directory already exist. Should we skip download step and start to create cluster based on it? [Y]/n"
-    read confirm
+    read -r confirm
     if [[ ! "${confirm}" =~ ^[nN]$ ]]; then
       echo "Skipping download step."
       create_cluster
@@ -143,10 +144,8 @@ fi
 kernel=$(uname -s)
 case "${kernel}" in
   Darwin)
-    platform="darwin"
     ;;
   Linux)
-    platform="linux"
     ;;
   *)
     echo "Unknown, unsupported platform: ${kernel}." >&2
@@ -158,16 +157,12 @@ esac
 machine=$(uname -m)
 case "${machine}" in
   x86_64*|i?86_64*|amd64*)
-    arch="amd64"
     ;;
   aarch64*|arm64*)
-    arch="arm64"
     ;;
   arm*)
-    arch="arm"
     ;;
   i?86*)
-    arch="386"
     ;;
   *)
     echo "Unknown, unsupported architecture (${machine})." >&2
@@ -224,7 +219,7 @@ fi
 
 if [[ -z "${KUBERNETES_SKIP_CONFIRM-}" ]]; then
   echo "Is this ok? [Y]/n"
-  read confirm
+  read -r confirm
   if [[ "${confirm}" =~ ^[nN]$ ]]; then
     echo "Aborting."
     exit 0

hack/.shellcheck_failures

@@ -31,9 +31,6 @@
 ./cluster/gce/upgrade-aliases.sh
 ./cluster/gce/upgrade.sh
 ./cluster/gce/util.sh
-./cluster/get-kube-binaries.sh
-./cluster/get-kube-local.sh
-./cluster/get-kube.sh
 ./cluster/images/conformance/run_e2e.sh
 ./cluster/images/etcd-empty-dir-cleanup/etcd-empty-dir-cleanup.sh
 ./cluster/juju/prereqs/ubuntu-juju.sh